/* * File...........: s390-tools/dasdview/vtoc.h * Author(s)......: Horst Hummel * Bugreports.to..: * * This is a user-space copy of the kernel vtoc,h. * * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2002 * * History of changes (starts March 2002) * 2002-03-12 initial */ #ifndef VTOC_H #define VTOC_H #include #include #include #include #include #include #include #include #include #include #define LINE_LENGTH 80 #define VTOC_START_CC 0x0 #define VTOC_START_HH 0x1 #define FIRST_USABLE_CYL 1 #define FIRST_USABLE_TRK 2 #define DASD_3380_TYPE 13148 #define DASD_3390_TYPE 13200 #define DASD_9345_TYPE 37701 #define DASD_3380_VALUE 0xbb60 #define DASD_3390_VALUE 0xe5a2 #define DASD_9345_VALUE 0xbc98 #define VOLSER_LENGTH 6 #define BIG_DISK_SIZE 0x10000 #define LV_COMPAT_CYL 0xFFFE /***************************************************************************** * SECTION: Definition from hdreq.h * *****************************************************************************/ struct fdasd_hd_geometry { unsigned char heads; unsigned char sectors; unsigned short cylinders; unsigned long start; }; typedef struct ttr ttr_t; typedef struct cchhb cchhb_t; typedef struct cchh cchh_t; typedef struct labeldate labeldate_t; typedef struct volume_label volume_label_t; typedef struct cms_volume_label cms_volume_label_t; typedef struct extent extent_t; typedef struct dev_const dev_const_t; typedef struct format1_label format1_label_t; typedef struct format4_label format4_label_t; typedef struct ds5ext ds5ext_t; typedef struct format5_label format5_label_t; typedef struct ds7ext ds7ext_t; typedef struct format7_label format7_label_t; typedef struct format9_label format9_label_t; struct __attribute__ ((packed)) ttr { u_int16_t tt; u_int8_t r; }; struct __attribute__ ((packed)) cchhb { u_int16_t cc; u_int16_t hh; u_int8_t b; }; struct __attribute__ ((packed)) cchh { u_int16_t cc; u_int16_t hh; }; struct __attribute__ ((packed)) labeldate { u_int8_t year; u_int16_t day; }; /* * The following structure is a merger of the cdl and ldl volume label. * On an ldl disk there is no key information, so when reading an * ldl label from disk, the data should be copied at the address of vollbl. * On the other side, the field ldl_version is reserved in a cdl record * and the field formatted_blocks exists only for ldl labels. So when * reading a cdl label from disk, the formatted_blocks field will contain * arbitrary data. * This layout may be a bit awkward, but the advantage of having the * same label type for both disk layout types is bigger than the effort * for taking a bit of extra care at the fringes. */ struct __attribute__ ((packed)) volume_label { char volkey[4]; /* volume key = volume label */ char vollbl[4]; /* volume label ("VOL1" in EBCDIC) */ char volid[6]; /* volume identifier */ u_int8_t security; /* security byte */ cchhb_t vtoc; /* VTOC address */ char res1[5]; /* reserved */ char cisize[4]; /* CI-size for FBA,... */ /* ...blanks for CKD */ char blkperci[4]; /* no of blocks per CI (FBA), blanks for CKD */ char labperci[4]; /* no of labels per CI (FBA), blanks for CKD */ char res2[4]; /* reserved */ char lvtoc[14]; /* owner code for LVTOC */ char res3[28]; /* reserved */ char ldl_version; /* version number, valid for ldl format */ u_int64_t formatted_blocks; /* valid when ldl_version >= "2" (in EBCDIC) */ }; /* * See: * z/VM V5R2.0 CMS Planning and Administration * SC24-6078-01 * What CMS Does / Disk and File Management / Disk File Format * http://publib.boulder.ibm.com/infocenter/zvm/v5r4/topic/com.ibm.zvm.v54.dmsd1/hcsg2b1018.htm */ struct __attribute__ ((packed)) cms_volume_label { char label_id[4]; /* Label identifier ("CMS1" in EBCDIC) */ char vol_id[6]; /* Volume identifier */ char version_id[2]; /* Version identifier ("\0\0") */ u_int32_t block_size; /* Disk block size (512, 1024, 2048 or 4096) */ u_int32_t origin_ptr; /* Disk origin pointer (4 or 5) */ u_int32_t usable_count; /* Number of usable cylinders/blocks */ u_int32_t formatted_count; /* Max # of formatted cylinders/blocks */ u_int32_t block_count; /* Disk size in CMS blocks */ u_int32_t used_count; /* Number of CMS blocks in use */ u_int32_t fst_size; /* File Status Table (FST) size (64) */ u_int32_t fst_count; /* Number of FSTs per CMS block */ char format_date[6]; /* Disk FORMAT date (YYMMDDhhmmss) */ char reserved1[2]; /* Reserved fields. The low-order bit of the first byte is a century flag. 0 = 1900s, 1 = 2000s. It is used in conjunction with "format_date" to determine the four-digit year. */ u_int32_t disk_offset; /* Offset in blocks to the start of the reserved file when the disk is reserved. This is the number of blocks to skip before the partition starts. */ u_int32_t map_block; /* Allocation map block with next hole */ u_int32_t hblk_disp; /* Displacement in HBLK data of next hole */ u_int32_t user_disp; /* Disp into user part of allocation map */ u_int32_t open_files; /* Count of SFS open files for this ADT. open_files is not really part of the volume label. It is not used for minidisks. */ char segment_name[8]; /* Name of the shared segment. segment_name is not really part of the volume label. It is not stored on disk. */ }; struct __attribute__ ((packed)) extent { u_int8_t typeind; /* extent type indicator */ u_int8_t seqno; /* extent sequence number */ cchh_t llimit; /* starting point of this extent */ cchh_t ulimit; /* ending point of this extent */ }; struct __attribute__ ((packed)) dev_const { u_int16_t DS4DSCYL; /* number of logical cyls */ u_int16_t DS4DSTRK; /* number of tracks in a logical cylinder */ u_int16_t DS4DEVTK; /* device track length */ u_int8_t DS4DEVI; /* non-last keyed record overhead */ u_int8_t DS4DEVL; /* last keyed record overhead */ u_int8_t DS4DEVK; /* non-keyed record overhead differential */ u_int8_t DS4DEVFG; /* flag byte */ u_int16_t DS4DEVTL; /* device tolerance */ u_int8_t DS4DEVDT; /* number of DSCB's per track */ u_int8_t DS4DEVDB; /* number of directory blocks per track */ }; /* * format 1 and format 8 label have the same layout so we use the following * structure for both. */ struct __attribute__ ((packed)) format1_label { char DS1DSNAM[44]; /* data set name */ u_int8_t DS1FMTID; /* format identifier */ char DS1DSSN[6]; /* data set serial number */ u_int16_t DS1VOLSQ; /* volume sequence number */ labeldate_t DS1CREDT; /* creation date: ydd */ labeldate_t DS1EXPDT; /* expiration date */ u_int8_t DS1NOEPV; /* number of extents on volume */ u_int8_t DS1NOBDB; /* no. of bytes used in last direction blk */ u_int8_t DS1FLAG1; /* flag 1 */ char DS1SYSCD[13]; /* system code */ labeldate_t DS1REFD; /* date last referenced */ u_int8_t DS1SMSFG; /* system managed storage indicators */ u_int8_t DS1SCXTF; /* sec. space extension flag byte */ u_int16_t DS1SCXTV; /* secondary space extension value */ u_int8_t DS1DSRG1; /* data set organisation byte 1 */ u_int8_t DS1DSRG2; /* data set organisation byte 2 */ u_int8_t DS1RECFM; /* record format */ u_int8_t DS1OPTCD; /* option code */ u_int16_t DS1BLKL; /* block length */ u_int16_t DS1LRECL; /* record length */ u_int8_t DS1KEYL; /* key length */ u_int16_t DS1RKP; /* relative key position */ u_int8_t DS1DSIND; /* data set indicators */ u_int8_t DS1SCAL1; /* secondary allocation flag byte */ char DS1SCAL3[3]; /* secondary allocation quantity */ ttr_t DS1LSTAR; /* last used track and block on track */ u_int16_t DS1TRBAL; /* space remaining on last used track */ u_int16_t res1; /* reserved */ extent_t DS1EXT1; /* first extent description */ extent_t DS1EXT2; /* second extent description */ extent_t DS1EXT3; /* third extent description */ cchhb_t DS1PTRDS; /* possible pointer to f2 or f3 DSCB */ }; struct __attribute__ ((packed)) format4_label { char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */ u_int8_t DS4IDFMT; /* format identifier */ cchhb_t DS4HPCHR; /* highest address of a format 1 DSCB */ u_int16_t DS4DSREC; /* number of available DSCB's */ cchh_t DS4HCCHH; /* CCHH of next available alternate track */ u_int16_t DS4NOATK; /* number of remaining alternate tracks */ u_int8_t DS4VTOCI; /* VTOC indicators */ u_int8_t DS4NOEXT; /* number of extents in VTOC */ u_int8_t DS4SMSFG; /* system managed storage indicators */ u_int8_t DS4DEVAC; /* number of alternate cylinders. Subtract from first two bytes of DS4DEVSZ to get number of usable cylinders. can be zero. valid only if DS4DEVAV on. */ dev_const_t DS4DEVCT; /* device constants */ char DS4AMTIM[8]; /* VSAM timestamp */ char DS4AMCAT[3]; /* VSAM catalog indicator */ char DS4R2TIM[8]; /* VSAM volume/catalog match timestamp */ char res1[5]; /* reserved */ char DS4F6PTR[5]; /* pointer to first format 6 DSCB */ extent_t DS4VTOCE; /* VTOC extent description */ char res2[10]; /* reserved */ u_int8_t DS4EFLVL; /* extended free-space management level */ cchhb_t DS4EFPTR; /* pointer to extended free-space info */ char res3; /* reserved */ u_int32_t DS4DCYL; /* number of logical cyls */ char res4[2]; /* reserved */ u_int8_t DS4DEVF2; /* device flags */ char res5; /* reserved */ }; struct __attribute__ ((packed)) ds5ext { u_int16_t t; /* RTA of the first track of free extent */ u_int16_t fc; /* number of whole cylinders in free ext. */ u_int8_t ft; /* number of remaining free tracks */ }; struct __attribute__ ((packed)) format5_label { char DS5KEYID[4]; /* key identifier */ ds5ext_t DS5AVEXT; /* first available (free-space) extent. */ ds5ext_t DS5EXTAV[7]; /* seven available extents */ u_int8_t DS5FMTID; /* format identifier */ ds5ext_t DS5MAVET[18]; /* eighteen available extents */ cchhb_t DS5PTRDS; /* pointer to next format5 DSCB */ }; struct __attribute__ ((packed)) ds7ext { u_int32_t a; /* starting RTA value */ u_int32_t b; /* ending RTA value + 1 */ }; struct __attribute__ ((packed)) format7_label { char DS7KEYID[4]; /* key identifier */ ds7ext_t DS7EXTNT[5]; /* space for 5 extent descriptions */ u_int8_t DS7FMTID; /* format identifier */ ds7ext_t DS7ADEXT[11]; /* space for 11 extent descriptions */ char res1[2]; /* reserved */ cchhb_t DS7PTRDS; /* pointer to next FMT7 DSCB */ }; struct __attribute__ ((packed)) format9_label { u_int8_t DS9KEYID; /* key code for format 9 labels (0x09) */ u_int8_t DS9SUBTY; /* subtype (0x01) */ u_int8_t DS9NUMF9; /* number of F9 datasets */ u_int8_t res1[41]; /* reserved */ u_int8_t DS9FMTID; /* format identifier */ u_int8_t res2[95]; /* reserved */ }; char *vtoc_ebcdic_enc (char const *source, char *target, int l); char *vtoc_ebcdic_dec (char const *source, char *target, int l); void vtoc_set_extent (extent_t *ext, u_int8_t typeind, u_int8_t seqno, cchh_t *lower, cchh_t *upper); void vtoc_set_cchh (cchh_t *addr, u_int32_t cc, u_int16_t hh); u_int32_t vtoc_get_cyl_from_cchh(cchh_t *addr); u_int16_t vtoc_get_head_from_cchh(cchh_t *addr); void vtoc_set_cchhb (cchhb_t *addr, u_int32_t cc, u_int16_t hh, u_int8_t b); u_int32_t vtoc_get_cyl_from_cchhb(cchhb_t *addr); u_int16_t vtoc_get_head_from_cchhb(cchhb_t *addr); u_int64_t cchhb2blk(cchhb_t *p, struct fdasd_hd_geometry *geo); u_int64_t cchh2blk (cchh_t *p, struct fdasd_hd_geometry *geo); u_int32_t cchh2trk (cchh_t *p, struct fdasd_hd_geometry *geo); void vtoc_set_date (labeldate_t *d, u_int8_t year, u_int16_t day); void vtoc_volume_label_init (volume_label_t *vlabel); int vtoc_read_volume_label (int fd, unsigned long vlabel_start, volume_label_t *vlabel); int vtoc_write_volume_label (int fd, unsigned long vlabel_start, volume_label_t const *vlabel); void vtoc_volume_label_set_volser (volume_label_t *vlabel, char const *volser); char *vtoc_volume_label_get_volser (volume_label_t *vlabel, char *volser); void vtoc_volume_label_set_key (volume_label_t *vlabel, char const *key); void vtoc_volume_label_set_label (volume_label_t *vlabel, char const *lbl); char *vtoc_volume_label_get_label (volume_label_t *vlabel, char *lbl); void vtoc_read_label (int fd, unsigned long position, format1_label_t *f1, format4_label_t *f4, format5_label_t *f5, format7_label_t *f7); void vtoc_write_label (int fd, unsigned long position, format1_label_t const *f1, format4_label_t const *f4, format5_label_t const *f5, format7_label_t const *f7, format9_label_t const *f9); void vtoc_init_format1_label (unsigned int blksize, extent_t *part_extent, format1_label_t *f1); void vtoc_init_format4_label (format4_label_t *f4lbl, unsigned int compat_cylinders, unsigned int real_cylinders, unsigned int tracks, unsigned int blocks, unsigned int blksize, u_int16_t dev_type); void vtoc_update_format4_label (format4_label_t *f4, cchhb_t *highest_f1, u_int16_t unused_update); void vtoc_init_format5_label (format5_label_t *f5); void vtoc_update_format5_label_add (format5_label_t *f5, int verbose, int trk, u_int16_t a, u_int16_t b, u_int8_t c); void vtoc_update_format5_label_del (format5_label_t *f5, int verbose, int trk, u_int16_t a, u_int16_t b, u_int8_t c); void vtoc_init_format7_label (format7_label_t *f7); void vtoc_update_format7_label_add (format7_label_t *f7, int verbose, u_int32_t a, u_int32_t b); void vtoc_update_format7_label_del (format7_label_t *f7, int verbose, u_int32_t a, u_int32_t b); void vtoc_init_format8_label (unsigned int blksize, extent_t *part_extent, format1_label_t *f1); void vtoc_update_format8_label (cchhb_t *associated_f9, format1_label_t *f8); void vtoc_init_format9_label (format9_label_t *f9); void vtoc_set_freespace(format4_label_t *f4, format5_label_t *f5, format7_label_t *f7, char ch, int verbose, u_int32_t start, u_int32_t stop, u_int32_t cyl, u_int32_t trk); #endif /* VTOC_H */